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aid +‎ -er


aider (plural aiders)

  1. A person who aids or assists.
    • 1548, Edward Hall, “The trobleous season of Kyng Henry the sixt, The .xv. yere”, in Hall’s Chronicle[1], London: Richard Grafton:
      The capitaines of the toune seyng theire pillers borken, and their chief ayders discomfited, rendered the toune to the duke of Somerset,
    • 1589, George Puttenham, The Arte of English Poesie[2], London: Richard Field, Book 3, Chapter 15, p. 254:
      [] arte is neither an aider nor a surmounter, but onely a bare immitatour of natures works, following and counterfeyting her actions and effects []
    • 1838 March – 1839 October, Charles Dickens, “Of the Internal Economy of Dotheboys Hall”, in The Life and Adventures of Nicholas Nickleby, London: Chapman and Hall, [], published 1839, →OCLC, page 73:
      [] being there as an assistant, he actually seemed—[]—to be the aider and abettor of a system which filled him with honest disgust and indignation, []
    • 1898, Paul Laurence Dunbar, chapter III, in The Uncalled: A Novel, New York, N.Y.: Dodd, Mead and Company, →OCLC, page 23:
      The woman in question had, as she said, been a close friend of Margaret’s, and, as such, an aider in her habits of intemperance.
  2. (climbing) A mountaineer's stirrup or étrier.
    As I was switching my feet in my aiders, the hook popped.

Usage notes[edit]

Often used in the phrase aider and abettor; see also aid and abet.

Related terms[edit]




Inherited from Middle French ayder, from Old French aidier, from Latin adiutāre (help, assist). Cognate with Spanish ayudar, Romanian ajuta, Italian aiutare, Portuguese and Catalan ajudar.


  • IPA(key): /ɛ.de/, /
  • (file)



  1. to help; to aid


Derived terms[edit]

Related terms[edit]


  • Saint Dominican Creole French: hinder
  • English: mayday (from (venez) m'aider!)

Further reading[edit]